Watch your butts, kids—a state appeals court says it’s OK for parents to spank them. In a ruling Wednesday, the state Appellate Division found that a Long Island father’s spanking of an 8-year-old boy “was a reasonable use of force.” A Suffolk County Family Court judge had determined last year that the father of the boy had abused his son “by inflicting excessive corporal punishment.” The father allegedly spanked the child with an open hand as punishment for cursing while they were at a party at friend’s home back in 2012, the appeals court ruling says. …